1、 ETSI TS 125 426 V14.0.0 (2017-04) Universal Mobile Telecommunications System (UMTS); UTRAN Iur and Iub interface data transport Essential, or potentially Essential, IPRs notified to ETSI in respect of ETSI standards“, which is available from the ETSI Secretariat. Latest updates are available on the
2、 ETSI Web server (https:/ipr.etsi.org/). Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web server) which are, or may be
3、, or may become, essential to the present document. Foreword This Technical Specification (TS) has been produced by ETSI 3rd Generation Partnership Project (3GPP). The present document may refer to technical specifications or reports using their 3GPP identities, UMTS identities or GSM identities. Th
4、ese should be interpreted as being references to the corresponding ETSI deliverables. The cross reference between GSM, UMTS, 3GPP and ETSI identities can be found under http:/webapp.etsi.org/key/queryform.asp. Modal verbs terminology In the present document “shall“, “shall not“, “should“, “should no
5、t“, “may“, “need not“, “will“, “will not“, “can“ and “cannot“ are to be interpreted as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms for the expression of provisions). “must“ and “must not“ are NOT allowed in ETSI deliverables except when used in direct citation. ETSI ETSI TS 125
6、426 V14.0.0 (2017-04)33GPP TS 25.426 version 14.0.0 Release 14Contents Intellectual Property Rights 2g3Foreword . 2g3Modal verbs terminology 2g3Foreword . 4g31 Scope 5g32 References 5g33 Definitions and abbreviations . 6g33.1 Definitions 6g33.2 Abbreviations . 6g34 Data Link Layer . 7g34.1 ATM Trans
7、port Option 7g34.1.1 Protection Switching at ATM Layer 7g34.2 IP Transport Option 7g35 Iur and Iub Data Transport for DCH and E-DCH Data Streams 8g35.1 Introduction 8g35.2 ATM Transport Option 8g35.3 IP Transport Option 8g36 Transport Signalling Application for DCH and E-DCH Data Streams 9g36.1 Intr
8、oduction 9g36.2 ALCAP in ATM Transport Option 9g36.3 ALCAP in IP Transport Option 9g37 Signalling Bearer for ALCAP on Iub Interface 9g37.1 Introduction 9g37.2 Signalling Bearer in ATM Transport Option . 10g37.3 Signalling Bearer in IP Transport Option . 10g38 Signalling Bearer for ALCAP on Iur Inter
9、face 10g38.1 Introduction 10g38.2 Signalling Bearer in ATM Transport Option . 11g38.3 Signalling Bearer in IP Transport Option . 11g39 Interworking between ATM and IP Transport Options . 11g39.1 Introduction 11g39.2 Interworking Alternatives . 11g3Annex A (informative): Change history . 13g3History
10、14g3ETSI ETSI TS 125 426 V14.0.0 (2017-04)43GPP TS 25.426 version 14.0.0 Release 14Foreword This Technical Specification (TS) has been produced by the 3rdGeneration Partnership Project (3GPP). The contents of the present document are subject to continuing work within the TSG and may change following
11、 formal TSG approval. Should the TSG modify the contents of the present document, it will be re-released by the TSG with an identifying change of release date and an increase in version number as follows: Version x.y.z where: x the first digit: 1 presented to TSG for information; 2 presented to TSG
12、for approval; 3 or greater indicates TSG approved document under change control. y the second digit is incremented for all changes of substance, i.e. technical enhancements, corrections, updates, etc. z the third digit is incremented when editorial only changes have been incorporated in the document
13、. ETSI ETSI TS 125 426 V14.0.0 (2017-04)53GPP TS 25.426 version 14.0.0 Release 141 Scope The present document specifies the transport bearers for the DCH/E-DCH data streams on UTRAN Iur and Iub interfaces. The corresponding Transport Network Control plane is also specified. The physical layer for th
14、e transport bearers is outside the scope of the present document. 2 References The following documents contain provisions which, through reference in this text, constitute provisions of the present document. uni25CF References are either specific (identified by date of publication, edition number, v
15、ersion number, etc.) or non-specific. uni25CF For a specific reference, subsequent revisions do not apply. uni25CF For a non-specific reference, the latest version applies. In the case of a reference to a 3GPP document (including a GSM document), a non-specific reference implicitly refers to the lat
16、est version of that document in the same Release as the present document. 1 3GPP TS 25.427: “UTRAN Iub/Iur interface user plane protocol for DCH data streams“. 2 ITU-T Recommendation I.361 (1995-11): “B-ISDN ATM layer specification“. 3 ITU-T Recommendation I.363.2 (2000-11): “B-ISDN ATM Adaptation L
17、ayer specification; Type 2 AAL“. 4 ITU-T Recommendation I.366.1 (1998-06): “Segmentation and Reassembly Service Specific Convergence Sublayer for the AAL type 2“. 5 ITU-T Recommendation Q.2630.1 (1999-12): “AAL type 2 signalling protocol (Capability Set 1)“. 6 ITU-T Recommendation E.191 (2000-03): “
18、B-ISDN addressing“. 7 ITU-T Recommendation X.213 (1995-11): “Information Technology - Open Systems Interconnection - Systems Interconnection - Network Service Definition“. 8 ITU-T Recommendation Q.2110 (1994-07): “B-ISDN ATM adaptation layer - Service Specific Connection Oriented Protocol (SSCOP)“.
19、9 ITU-T Recommendation Q.2130 (1994-07): “B-ISDN signalling ATM adaptation layer - Service Specific Coordination Function for Support of Signalling at the User-Network Interface (SSCF at UNI)“. 10 ITU-T Recommendation Q.2150.2 (1999-12): “AAL type 2 signalling transport converter on SSCOP)“. 11 ITU-
20、T Recommendation Q.2210 (1996-07): “Message transfer part level 3 functions and messages using the services of the ITU-T Recommendation Q.2140“. 12 ITU-T Recommendation Q.2140 (1995-02): “B-ISDN ATM adaptation layer - Service Specific Coordination Function for Support of Signalling at the Network No
21、de Interface (SSCF at NNI)“. 13 ITU-T Recommendation Q.2150.1 (1999-12): “AAL type 2 signalling transport converter on broadband MTP“. 14 IETF RFC 791 (1981-09): “Internet Protocol“. 15 IETF RFC 1483 (1993-07): “Multiprotocol Encapsulation over ATM Adaptation Layer 5“. 16 IETF RFC 2225 (1998-04): “C
22、lassical IP and ARP over ATM“. 17 IETF RFC 768 (1980-08): “User Datagram Protocol“. ETSI ETSI TS 125 426 V14.0.0 (2017-04)63GPP TS 25.426 version 14.0.0 Release 1418 IETF RFC 2960 (2000-10): “Stream Control Transmission Protocol“. 19 IETF RFC 3332(2002-09): “Signalling System 7 (SS7) Message Transfe
23、r Part 3 (MTP3) User Adaptation Layer (M3UA)“. 20 ITU-T Recommendation I.630 (1999-02): “ATM protection switching“. 21 ITU-T Recommendation Q.Imp2210 (1996-07): “Implementors guide (03/99) for Recommendation Q.2210 (07/96)“. 22 ITU-T Recommendation Q.2630.2 (2000-12): “AAL type 2 signalling protocol
24、 (Capability Set 2)“. 23 IETF RFC 1661 (1994-07): “The Point-To-Point Protocol (PPP)“. 24 IETF RFC 1662 (1994-07): “PPP in HDLC-like Framing“. 25 IETF RFC 2507 (1999-02): “IP header compression“. 26 IETF RFC 1990 (1996-08): “The PPP Multilink Protocol (MP)“. 27 IETF RFC 2686 (1999-09): “The Multi-Cl
25、ass Extension to Multi-Link PPP“. 28 IETF RFC 2509 (1999-02): “IP Header Compression over PPP“. 29 IETF RFC 2460 (1998-12): “Internet Protocol, Version 6 (IPv6) Specification“. 30 IETF RFC 2474 (1998-12): “Definition of the Differentiated Services Field (DS Field) in the IPv4 and IPv6 Headers“. 31 I
26、ETF RFC 768 (1980-08): “User Datagram Protocol“. 32 IETF RFC 3153 (2001-08): “PPP Multiplexing“. 33 IETF RFC 2364 (1998-07): “PPP over AAL5“. 34 IETF RFC 3031 (2001-01): “Multiprotocol Label Switching Architecture“. 35 Void 36 ITU-T Recommendation E.164 (1997-05): “The international public telecommu
27、nication numbering plan “. 37 IETF RFC 3309 (2002-09): “SCTP Checksum Change“. 38 3GPP TS 25.414: “UTRAN Iu Interface data transport & transport signalling“. 39 3GPP TS 25.401: “UTRAN overall description“. 3 Definitions and abbreviations 3.1 Definitions For the purposes of the present document, the
28、following term and definition applies: ALCAP: transport signalling protocol used to setup and tear down transport bearers 3.2 Abbreviations For the purposes of the present document, the following abbreviations apply: AAL2 ATM Adaptation Layer type 2 AESA ATM End System Address ATM Asynchronous Trans
29、fer Mode ETSI ETSI TS 125 426 V14.0.0 (2017-04)73GPP TS 25.426 version 14.0.0 Release 14CPCS Common Part Convergence Sublayer CPS Common Part Sublayer DCH Dedicated Channel E-DCH Enhanced DCHHDLC High level Data Link Control HS-DSCH High Speed Downlink Shared Channel IP Internet Protocol LC Link Cha
30、racteristicsM3UA SS7 MTP3 User Adaptation layer ML/MC Multi-link / Multi-class MPLS Multiprotocol Label Switching MTP Message Transfer Part NNI Network-Node InterfaceNSAP Network Service Access Point PPP Point to Point Protocol PT Path Type SAAL Signalling ATM Adaptation Layer SAR Segmentation and R
31、eassembly SCTP Stream Control Transmission Protocol SSCF Service Specific Co-ordination Function SSCOP Service Specific Connection Oriented Protocol SSCS Service Specific Convergence Sublayer SSSAR Service Specific Segmentation and Reassembly sublayer STC Signalling Transport Converter UDP User Data
32、gram Protocol UNI User-Network Interface4 Data Link Layer 4.1 ATM Transport Option ATM shall be used in the transport network user plane and transport network control plane according to ITU-T Rec. I.361 2. 4.1.1 Protection Switching at ATM Layer If redundancy of pathways at ATM Layer between RNC and
33、 Node B is supported, it shall be implemented using ATM Protection Switching according to ITU-T Rec. I.630 20. 4.2 IP Transport Option A UTRAN node supporting IP transport option shall support PPP protocol IETF RFC 1661 23 with HDLC framing (IETF RFC 1662 24). NOTE: This does not preclude the single
34、 implementation and use of any other L2/L1 protocols (e.g. PPPMux/AAL5/ATM (IETF RFC 3153 32), (IETF RFC 2364 33), PPP/AAL2/ATM, Ethernet, MPLS/ATM (IETF RFC 3031 34), etc.) fulfilling the UTRAN requirements towards the upper layers. A UTRAN node supporting IP transport option and having interfaces
35、connected via low bandwidth PPP links like E1/T1/J1 shall also support IP Header Compression (IETF RFC 2507 25) and the PPP extensions ML/MC-PPP (IETF RFC 1990 26, IETF RFC 2686 27). In this case the negotiation of header compression (ITU-T Rec. I.630 20) over PPP shall be performed via IETF RFC 250
36、9 28. ETSI ETSI TS 125 426 V14.0.0 (2017-04)83GPP TS 25.426 version 14.0.0 Release 145 Iur and Iub Data Transport for DCH and E-DCH Data Streams 5.1 Introduction The Frame Protocol for DCH and E-DCH data streams (TS 25.427 1) is the user of the transport layer specified in the present document. Ther
37、e are two options for the transport layer of the DCH and E-DCH data streams in Iur and Iub: 1) ATM based transport (ATM Transport Option) 2) IP based transport (IP Transport Option) The following figure shows the protocol stacks of the two options. Protocol stack for ATM transport option Protocol st
38、ack for IP transport option Figure 1: Transport network layer for DCH data streams over Iur and Iub interfaces 5.2 ATM Transport Option Asynchronous Transfer Mode (ATM) (ITU-T Rec. I.361 2) and ATM Adaptation Layer type 2 (AAL2) (ITU-T Rec. I.363.2 3, ITU-T Rec. I.366.1 4) are used as a transport la
39、yer for DCH and E-DCH data streams on Iur and Iub interfaces. Service Specific Segmentation and Reassembly (SSSAR) sublayer for AAL2 is used for the segmentation and reassembly of AAL2 SDUs. 5.3 IP Transport Option UDP (IETF RFC 768 17) over IP shall be supported as the transport for DCH and E-DCH d
40、ata streams on Iub and Iur interfaces. The data link layer is as specified in chapter 4.2. An IP UTRAN Node shall support IPv6 (IETF RFC 246029). The support of IPv4 (IETF RFC 79114) is optional. NOTE: This does not preclude single implementation and use of IPv4. IP dual stack support is recommended
41、 for the potential transition period from IPv4 to IPv6 in the transport network. The transport bearer is identified by the UDP port number and the IP address (source UDP port number, destination UDP port number, source IP address, destination IP address). The source IP address and destination IP add
42、ress exchanged via Radio Network Layer on the Iur/Iub interface shall use the NSAP structure. See sub clause 6.1.8.2 of TS 25.401 39. IP Differentiated Services code point marking (IETF RFC 2474 30) shall be supported. The mapping between traffic categories and Diffserv code points shall be configur
43、able by O&M. Traffic categories are implementation-specific and may be determined from the application parameters. UDP (RFC768)IPv6 (RFC2460)Dat a l i nk l ayerPhysical layerRadio Network LayerAAL2 SSSAR ( I .3 66 .1)AAL2 CPS (I.363.2)ATMPhysical layerRadio Network LayerTransport Net work LayerTr an
44、 spor t Network LayerIPv4 optional (RFC791)ETSI ETSI TS 125 426 V14.0.0 (2017-04)93GPP TS 25.426 version 14.0.0 Release 146 Transport Signalling Application for DCH and E-DCH Data Streams 6.1 Introduction This chapter specifies the ALCAP protocol(s) to be used in Iur and Iub interfaces for DCH data
45、streams. 6.2 ALCAP in ATM Transport Option AAL2 signalling protocol Capability Set 2 (ITU-T Rec. Q.2630.2 22) is the signalling protocol to control AAL2 connections on Iub and Iur interfaces. ITU-T Rec. Q.2630.2 22 adds new optional capabilities to ITU-T Rec. Q.2630.1 5. Binding ID provided by the r
46、adio network layer shall be copied in SUGR parameter of ESTABLISH.request primitive of ITU-T Rec. Q.2630.2 22. User Plane Transport bearers for Iur interface are established, in all normal cases released and optionally modified by the ALCAP in the Serving RNC. The binding identifier shall already be
47、 assigned and tied to a radio application procedure when the Establish Request message is received over the Iur interface in the Drift RNC. User Plane Transport bearers for Iub interface are established, in all normal cases released and optionally modified by the ALCAP in the Controlling RNC. Bindin
48、g identifier shall already be assigned and tied to a radio application procedure when the Establish Request message is received over the Iub interface in the Node B. In case of a Reset initiated by the CRNC, the ALCAP in the Node B shall release the transport bearers involved in the impacted Node B
49、Communication Contexts. The Node B shall also initiate release of the user plane transport bearers for the removed dedicated channels that were remaining within the cell when the cell is deleted. AAL2 transport layer addressing is based on embedded E.164 or other AESA variants of the NSAP addressing format (ITU-T Rec. E.191 6, ITU-T Rec. X.213 7). Native E.164 addressing (ITU-T Rec. E.164 36) shall not be used. The Link Characteristics parameter (LC
